Sand-pump



G. W. ROSE.

f @um f UNITED ySTATES PATENT @Frisia GEORGE W. ROSE, or BRADFORD,PENNSYLVANIA.

SAND-PUMP.

SPECIFICATION forming part of Letters Patent No. 233,549, dated October19, 1880. Application filed February 27, 1880.

To all 'whom it may concern Be it known lthat I, GEORGE W. ROSE, ofBradford, in the county of McKean and State of Pennsylvania, haveinvented certain lmprovements in Sand-Pumps, of which the following is aspecification.

This invention relates to that class of devices commonly known as sandpumps, which are employed to remove sand, chips, drillings, Sto., frombored wells during the operation of sinking the same.

The invention consists in various details of construction, which arehereinafter described in detail, but more particularly in combining withan upwardly-acting bottom valve a secondary central valve therein, andin connectin g the piston and the upwardly-closing bottom valve in suchmanner that the former closes the latter and lifts the pump with an easyaotion and without shock.

Figure 1 represents a vertical central section of my pump with thepiston depressed; Figs. 2 and 3, vertical central sections of the lowervalve in a modified form Fig. 4, a vertical central section of the lowerend of the pump, as shown in Fig. 1, with the piston in its highestposition.

The pum p consists, essentially,of a cylindrical barrel or body, aninternal tubular rod or stem carrying a piston at its lower end, and acen-.

tral rod or stem arranged within the pistonrod and carryin g at itslower end a valve, which closes against the lower end of the pump-bodywhen the piston is drawn up to its highest point, but which fallstherefrom as soon as the piston commences its descent.

Referring to the drawings, A represents the cylinder or body of thepump; B, an internal tubular rod or stem carrying at its lower end apiston, C, and D a central stem or rod sliding freely within thelast-mentioned stem, and provided at its upper end with a head orenlargement, and at its lower end with a valve, E. Screwed or otherwisesecured upon the lower end ofthe barrel or cylinder A is a valvecage, F,open on its sides, which limits the fall of the valve E, and which isfurnished with an interior ledge or shoulder, a, the lower face of whichforms a seat for the valve, while the upper face serves as a stop tolimit the downward movement of the piston, as clearly shown in Fig. 1.The valve-stem D is formed with a head or enlargement, b, at. its upperend, which is of a diameter to lit and move freely within the tubularstem B, thus serving to guide the upper end, while the rod or stem D isfurther guided where it passes through the piston C, as shown in Fig. 1,the piston consisting of a nut, c, screwed upon the exterior of thetubular rod or stem B, a disk or washer, d, of leather, 6o rubber, orlike flexible material, and a cap or nut, e, of a diameter to fitloosely the interior of the pump-cylinder A, screwed upon the lower endof the tubular stem B, and serving to clamp and support the leatherdisk. The lower face of the cap eis provided with a central opening justlarge enough to permit the stem D to slide freely through it until thehead b and cap c come in contact, when the two stems will move together.7o

The device being thus constructed, the operation is as follows: A stoutcord is attached to the upper end of the piston rod or stem B, and thepump thereby lowered into the well until the lower end of the valve-cageF comes in contact with the bottom, causing the fall of the barrel orbody A to cease. The gravity of the piston and its rod causes them tocontinue falling, thereby, also', permitting the valve E to fall fromits seat on the ledge a to the bottom 8o of its cage, while the pistoncontinues 'to fall until it reaches the lower end of the barrel A. Thecord is then drawn upward, causing the piston C to rise, whereupon thewater containing` the chippings, sand, Sto., rushes in to fill thevacuum. When the piston has almost completed its upward movement the cape of the piston engages with the head b of the valve-stem, raising thevalve E against its seat, as shown in Fig. 4, in which position the 9oparts remain while the entire device is withdrawn from the well by meansof the cord. When the pump is raised to the surface its lower end isallowed to rest upon the ground, when, byrslackening the cord, the valveE is permitted to fall and the contents ot the cylinder allowed toescape at the bottom.

Instead of the solid valve shown and described in connection with Figs.1 and 4, it is apparent that the end of the rod or stem D roo may beforked, and the valve E formed thereon provided with a central opening,f, opened and closed by an upwardly-swinging gate or leaf, g,orequivalent upwardly-opening device.

The operation of the device under this construction is the same as underthat above described, except that the Water and other matters areenabled to pass up through the valve as well as over it into thepump-cylinder.

It is apparent that the detailsroi construction are susceptible ofmodification, the piston, for instance, being formed solidly upon thestem, the cage F being made in one piece with the cylinder; or the rodor stem D may be limited in its movement by a pin or set-screw. rllheseand other modications will readily suggest themselves to the practicalmechanic.

By reference to Fig. 1, it will be observed that the lower part of therod or stem B is in the form of a perfect or complete tube, While itsupper portion is open on the sides. This construction causes the head bto be cushioned upon the Water, or, in its absence, by the air conned inthe lower part of the tubular stem B, preventing any jar or concussionin lifting the pump from the Well.

Having thus described my invention, what I claim is- Y l. Thecombination of the cylinder, apiston, and the upWardly-closin gfoot-valve provided with the central opening and the secondarydownwardly-closing valve to close the same.

2. In asand-pump, the combination of a body or cylinder, a piston whichafter rising a limited distance in the cylinderlifts the same, and abottom valve which closes gradually as the 'piston is in the act ofcompleting its upward stroke, whereby the shock produced in lifting thecylinder is deadened and diminished.

3. 1n combination with the rod or stern B, having the tubular closedlower end to retain water, the valve-stem D, provided with the head b,substantially as and for the purpose set forth.

GEORGE W. ROSE.

Witnesses:

G. TAYLOR, W. J. McVAY.

